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NMTT 1409: MIDTERM LAB WRITTEN REVIEW QUESTIONS & ANSWERS RATED 100% CORRECT!!
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NMTT 1409: MIDTERM LAB WRITTEN REVIEW QUESTIONS & ANSWERS RATED 100% CORRECT!!
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NMTT 1409: MIDTERMLAB WRITTEN REVIEW
QUESTIONS &
ANSWERS RATED
100% CORRECT!!
NMTT 1409
Evatee 8/20/24 NMTT 1409
, NMTT 1409: MIDTERM LAB WRITTEN
REVIEW QUESTIONS & ANSWERS RATED
100% CORRECT!!
What characteristics are needed in a good calibration standard? Answer - -
Ans:
- (i). long Tp
- (ii). monoenergetic (1 energy)
- *Tech Tip: Cs-137 meets these requirements
To center the photopeak in the middle of the window when using a scintillation
well counter, the (i). ______, (ii). ______, or (iii). ______ could be adjusted.
Answer - - Ans:
- (i). high voltage (HV)
- (ii). window
- (iii). gain
The window used for calibration is (a). ______, whereas, the window used for
imaging or sample counting is (b). ______. Answer - - Ans:
- (a). narrow [20 units (3%)]
- (b). wider (20%)
(a). Identify the formula used to calculate %difference from day to day on a
scintillation well counter/thyroid probe and (b). discuss the expected results.
Answer - - Ans:
- (a). (today's cpm - most recent cpm)/most recent cpm x 100
- (b). results should be +/- 5%
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